I hope my post didn't give the impression that Levis will be a bust. I think he has a fair ceiling of Cousins who, despite his flaws and subpar primetime performances, is nowhere near a "bust" and is having a very good career. I also wouldn't think Jimmy G is a "bust" either. Both are viable starters and I think Levis can be, too.
Again, I think it's a fair question as to whether a Kirk Cousins* is worth a #1 pick. I don't know that answer.
*I.e. a very good QB but not a superstar QB that can carry an entire team on his back like a Brady, Rodgers, Mahomes, Allen, etc.